Question

Maximum Marks ]
QI Einstein's equation relating mass and Energy is given by the formula Ezot, whez mis
the mass of an object and 3 x 10 ms', the speed of light.
2 Find how much energy is present in a 1 kg mass. (1 kg ms' = 1 joule)
12]
b. Given that a stzaczed light bulb uses 60 joules of energy every second, calculate bor
long (in years) such a light bulb could be powered by a 1 kg mass, if all the mass was
converted to dete
[3]

Answer 1

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